Weighing-scale.



T. B. POWERS. WFIGHIN G SCALE.

APPLICATION FILED NOV; 25. I914.

- Patented. Nov. 9, 1915.

WITNESSES:

INI EII/TOR TI mofny 5. Fewer B" m I l ATTORNEYS by two flat springs 15.

TIMOTHY B. POWERS, 0F NEJV YORK, N. Y.

WEIGHING-SCALE.

Specification of Letters Patent.

Patented Nov. 9, 12115.

Application f led November 25, 1am. Serial No. 873,854.

To all whom it may concern.

Be it known that 1, TIMOTHY B. Powers, a citizen of the United States,and a resi dent of the city of New York, borough of Manhattan, in thecounty and State of New York, have invented a new and ImprovedlVeighingScales, of which the following 1S a full, clear, and exactdescription.

Among the principal objects which the present invention has in view are:To eliminate frictional resistance in the working or moving elements ofthe apparatus; to provide an apparatus of the character mentioned havinga simplified and durable structure; to provide a registering mechanism,simplified in construction and accurate in operation; to provide meansfor justifying said scales; and to provide yielding supports operativelyconnected in substantially parallel relation.

Drawings.Figure 1 is a side view of weighing scales constructed andarranged in accordance with the present invention; Fig.

2 is a horizontal. section taken on the line 2-2 in Fig. 1; Fig. 8 is adetail view on an enlarged scale, of the head of the support ingstandard, the section being taken as on the line 8&3 in Fig. 2; Fig. 1is a detail view on an enlarged scale of the upper end of the scale panspindle, the section being taken as on the line l- 1 in Fig. 2; Fig. 5is a side elevation of weighing scales constructed and arranged inaccordance with a modified form of the invention. Fig. 6 is a hori-'zontal section taken on the line 66 in Fig. 5.

Descripti0m-1n both'the preferred and modified forms of the invention asupporting standard 11 is employed. The standai '.s 11 are both rigidlymounted or.integrally secured upon a base 12. Each form of the inventionis also provided with a' scale pan- 13, which is supported upon aspindle 1 1. The spindle 14: in each form is operatively connected withthe standard 11 The springs 15, standard -11 and spindle 1 1 arepreferably disposed in rectangular relation, as shown best in Figs. 1and 5 of the drawings.

The springs 15 are secured in the standards 11 and spindles 1 1 as bestshown in Figs. 3 and 4; of the drawings, wherein there are shown splitclamping plugs 16. To hold the plugs 16, the standards 11 and thespindles 1 1 are each perforated to receive snugly said plugs. The plugs16 are perforated, and the perforations are tapped to register with thescrew-threads of screws 17, 18, 19 and 20. The screw 17 is supported atthe upper end of the standard 11 by a cap plug 21, which provides afinish for said standard, as well as a support for said screw.

-When the screw is tightened the cap plug 21 is drawn firmly upon theplug 16 with v which said screw 17 is engaged.

The screw .18 is similarly mounted in the plug 16 holding the outer endof the upper spring 15 As shown best in Fig. 4 of the drawings, thespindle 14 extends above the upper spring 15 andthe plug 16 thereof.

Tohold the head of the screw 18, therefore,

it becomes necessary that a hollow filler piece 22 shall be used, theinner end of said piece being contracted to provide a seat for the headof the screw 18. The piece 22 also affords a mounting for a plug 23,which is rigidly held by a short screw 44, to the scale pan 13. Theprovisions made for holding the screws 17 and 18 in'position areduplicated to hold the screws 19 and 20 in place. In all of the devicesthus employed an eflort has been made to avoid straining or cramping theplugs 16, thereby likewise avoiding the introduction into the springs oftorsional or other disturbing stresses. In each 16 before closing ortightening upon the,

ends of the standards 11 or spindles 1 1.

The springs 15 may be of any desired strength. for handling heavyweights, springs ,of heavier grade, or of greater strength, areemployed. Also, the graduated plates are variously subdivided, theproportionate movement of the lighter and heavier springs varying inconformity with the work per-.

formed. Thus, in the scales illustrated in Fig. 1 of the drawings thesprings 15 are light in character, the maximum deflection thereof beingproduced by a weight not eX- ceeding 8 ounces. This deflection is measured on a graduated plate 24 by a pointer 25. The pointer 25 ispivotally connected by a pin 26 to the spindle 1 1. The fulcrum of thepointer 25 is a connecting pin 27 at the upper end of a screw bolt 28.

The bolt 28 is coupled as a unit with a companion bolt 29, said boltseach having a I screw thereon, oppositely pitched, the threads whereofregister with an elongated nut 30 which, when manipulated, serves toexpand or contract the combined length of the bolts 28 and 29.

lVhere the scales are employed- The rectangular arrangement 01' the .5:rings 15, standard 11 and spindle 14 prouces-a movement in the spindle14 to and -In the modified form of the invention, as;

seen best in Fig. 5 of pointer 25 is replaced by a relatively shortpointer 33. The pointer 33 is pivotally mounted by a spindle shaft 3stto swing over a graduated plate 35. The plate 35 is provided with aseries of relatively smaller graduations accumulated to register up totwo pounds. The movement of the spindle 14 is approximately thestruction shown in Fig. 5 of the drawings as in that shown in Fi g. 1,while the relative movement of the pointer 33 is around a greatlymagnified arc.

i To move the pointer 33 the spindle 14 in the modified form is providedwith an extended plate 36, to which it is rigidly secured by pins 37,said plate being inserted in a slot cut or otherwise provided thereforin said spindle. The inner end of the plate 36 is provided with a geartoothed rack 38, the teeth whereof mesh with the teeth of a small gearpinion 39, which pinion is fixedly mounted on the spindle shaft 34, to.which the drawings the the pointer 33 is also rigidly connected. The

graduated plates 24 and 35 are both rigidly held by means of pins 40 inthe standards 11.

In the construction of the modified form shown in Figs. 5 and 6, theplate 35 is slightly offset from the median vertical plane of theapparatus, to permit the registration of the pinion 39 with the teeth ofthe rack 38 on the plate 36. To form bearings for the spindle shaft 34,a bracket plate 41 is provided, said bracket plate being rigidly securedby screws 4:2 or by small rivets, to said plate 35, as seen best in Fig.6 of-the drawings;

The pointer 33 extends through a segment slot 43 formed in the plate 35concentric with the bearing of the shaft 34, said slot a plurality offiat springs being co-e3 ten s1ve with the graduated markings on theplate 35.

Claims:

1. An apparatus as characterized, com.- prising a horizontally-disposedscale pan; a vertically-disposed spindle rigidly connected with said panfor supporting .the same; a vertically-disposed supporting standard;

disposed in parallel relation, said springs being rigidly same in thecon-' stantially rectangular space;

connected with said standard and said spindle, and operating to preservethe parallel relation of said spindle and said standard; an index platemounted on said standard, extending toward said'spindle and havingimpressed thereon graduate scale markings; and a pointer pivotallymounted on an independent support, said pointer being adapted to moveover the graduated markings on said index plate, said pointer beingpivotally connected with said spindle intermediate said index plate andsaid independent support.

2. An apparatus as characterized, comprising a horizontally-disposedscale pan; a vertically-disposed with said pan for supporting the same;a vertically-disposed supporting standard; a plurality of flat springsdisposed in parallel relation, said springs being rigidly connected withsaid standard and said spindle, and operating to preserve the parallelrelation of said spindle and said standard; an index plate mounted onsaid standard, extending toward said spindle and having impressedthereon graduated scale markings; a pointer having a free end to moveover the impressed surface of said index plate, and pivotally connectedwith said spindle intermediate the ends of said pointer; and a swingingrod pivotally connected with the outer end of said pointer to permit alengthwise movement of said pointer.

3. An apparatus as characterized, comprising a scale pan;avertically-disposed spindle rigidly connected with said pan; avertically-disposed standard; a base supporting said standard andextending beneath said pan; a plurality of flat supporting springsconnecting said spindle and said standard, said springs being rigidlyattached to said spindle and standard and spaced apart in parallelrelation and form ing with said spindle and standard a subspindlerigidly connected plate rigidly mounted on said standard between saidsprings and in a plane coinci dent therewith; a movable pointeroperatively disposed with reference to said plate and between saidincident therewith; and connecting said pointer for moving said pointercorrespondence with the spindle.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

TIMOTHY B. POWERS.

and said spindle, over said plate in Witnesses E. F. Monnocx, G. H.EMsLin.

movement of said springs and in a plane comeans operatively

